C-02 — Communication Systems and Networking

What is the sharing of information and expression called?

Before inventing languages, what did human beings first use to communicate?

Communication is best described as a medium of —

In the present age, besides communicating among themselves, human beings can now also communicate with —

Data communication is the process of establishing a link between two points for —

In a data communication system, data from the source is converted to an electric signal via the —

The scattered unexpected electric signals that may be added to the medium during transmission are called —

Which of the following is an example of a source in data communication?

Which of the following acts as a transmitter in data communication?

Which one is an example of the destination (output transducer + data destination)?

Consider the following components of data communication:

The speed of the internet depends on the signal's —

What is the unit in which bandwidth is usually calculated?

How many bits make up one byte?

1 MBps is equal to —

Mbps stands for how many bits per second?

The bandwidth of a communication network depends on —

Compared to a telephone cable, an optical fiber cable can provide —

Data transmission methods are divided into two types based on the distribution of —

Which transmission method sends one bit at a time into one medium?

In parallel data transmission, multiple data bits are transmitted over —

Which is the faster way of transmitting data but unsuitable for long distance?

The popular Universal Serial Bus (USB) port uses which transmission method?

Why is serial transmission viewed as a reliable data transmission method?

Consider the following statements about parallel transmission:

In serial data transmission, both transmitter and receiver use a clock to —

The technique that determines the beginning and ending of a bit with the clock is called —

Based on bit synchronization, serial data transmission is classified into how many types?

In asynchronous transmission, data is transferred in —

Prior to sending data in asynchronous transmission, the transmitter sends a —

Which device uses asynchronous data transmission because of the undetermined time between key presses?

Asynchronous transmission does NOT need which of the following?

In synchronous transmission, the receiver station divides data characters into blocks or frames and stores them in —

In synchronous transmission, the header signal is used by the receiver machine to —

Which transmission technique is usually used to transmit data over long distances using a larger bandwidth?

Cellular networks and TV networks use which transmission technique?

Isochronous transmission is best described as —

Which transmission technique is used in real time applications such as multimedia communications, audio and video calls?

Consider the following about isochronous transmission:

Data transmission mode denotes the —

In which mode is the transmission flow one directional only?

Keyboard, mouse and joystick are examples of which transmission mode?

In which mode can data transmission be bidirectional but not at the same time?

Walkie Talkie, fax and SMS operate in which mode?

In which mode can both devices simultaneously transmit and receive data?

Telephones and cellular networks are examples of which mode?

In which distribution mode does one transmitter communicate with just one receiver?

Broadcast mode can only be —

Radio and televisions are examples of which distribution mode?

In multicast mode, the data can be received by —

Video conferencing and chatting are examples of which mode?

A group SMS is an example of which distribution mode?

Consider the following statements:

The channels used to exchange data between a transmitter and receiver are known as —

Wired or cable-based media are classified as —

Which of the following is an example of guided media?

Which wireless wave has a frequency range of 3 KHz–300 GHz?

Bluetooth is used to make which type of network?

WiMax is used to make which type of network?

Which material is used as the medium in wired cable communication?

Twisted pair cables can be of how many types?

Up to what distance can twisted pair cables transmit data?

Depending on the category, the bandwidth of twisted pair cables can be —

Twisted pair cables are generally used in —

At the center of a coaxial cable there is a —

Why is it called a coaxial cable?

Coaxial cables are particularly used in —

Coaxial cables can be of two types —

Thinnet is also known as —

Up to what distance can thinnet transmit data at 10 Mbps without repeaters?

A device that can amplify a weak signal into a strong signal is called a —

Thicknet is known as —

Up to what distance can thicknet cable easily transmit data?

Fiber-optic cables contain one or more glass made fibers that are used to carry —

The part of the optical fiber where the refraction index is the highest is called the —

The part of the optical fiber where the refraction index is the lowest is called the —

The difference in refraction index makes the light travel through the cable using the principle of —

An optical fiber has a diameter of about —

If the core diameter is between 8 and 12 microns, the fiber is called —

Single mode fibers are used for —

If the core diameter is between 50 to 100 microns, the fiber —

Why is multi mode fiber used only in short distance slow speed transmissions?

Which light source is preferable for long distance optical fiber communication?

Why is laser preferred over LED for long distance optical fiber communication?

Optical fiber is highly transparent to which range of light?

Consider the following statements about single mode fiber:

Exchange of information between two devices through electromagnetic waves without wires is known as —

The higher the frequency of a wave, the —

Which two portions of the electromagnetic spectrum have played key roles in modern communication?

For communication, which frequency range of radio waves is widely used?

Why are radio waves more commonly used for broadcasting?

The antenna used to transmit a signal has to be how much of the signal's wavelength?

Radio waves are reflected in the —

For communication, which frequency range of microwaves is widely used?

Unlike radio waves, microwaves —

For microwave communication, the connection has to maintain —

There are how many types of microwave communications?

In terrestrial microwave communication, a relay or repeater station is placed after every —

A satellite placed about 36000 kilometers above ground level that circles the earth at the same speed as its rotation is called a —

VSAT stands for —

Bangabandhu-1 is an example of a —

Consider the following about microwave communication:

IOT stands for —

A smart wristband that sends pulse rates and walking speeds to a smartphone is an example of a/an —

In IOT, electronic devices, sensors and appliances are connected through a network so they can be operated with a —

Bluetooth is a technology that communicates wirelessly between two devices in a —

A Bluetooth network is a type of —

Bluetooth works in which frequency?

What is the range of a Bluetooth network?

A Bluetooth network is also known as a —

A piconet can contain a maximum of how many devices?

Multiple piconets can form a network called a —

Bluetooth has a transmission rate of about —

Wi-Fi is the short form of —

The word Wi-Fi is trademarked by an organization called the —

Wi-Fi usually operates between which frequency range?

The coverage area of Wi-Fi spans from —

Why does Wi-Fi have an obvious issue of security?

WiMax is the short form of —

WiMax operates between which frequency range?

WiMax can transmit data at the rate of —

Each WiMax base station has a coverage area of —

Unlike Wi-Fi, the use and installment of WiMax networks need —

According to Table 2.2, what is the IEEE standard for Bluetooth?

According to Table 2.2, what is the IEEE standard for Wi-Fi?

According to Table 2.2, what is the IEEE standard for WiMax?

According to Table 2.2, which technology forms a WLAN?

Consider the following statements:

Wireless communication between mobile or stationary devices at a distance is called —

To establish a mobile or cellular network, an area is divided into multiple —

Which station determines the receiving base station of the person who will receive a call?

Mobile phones are called cellular phones because they work between different —

Mobile phones were first used by the US military in which year?

Commercially manufactured mobile phones can be divided into how many generations?

Which company began commercially manufacturing mobile phones in the 80s?

The first handheld mobile phone manufactured and used in the United States was the —

The first generation (1G) covered which period?

AMPS stands for —

Replacing analog transmissions with digital transmissions signalled the beginning of which generation?

A second generation (2G) network is also known as a —

The two new features of second generation mobile phones were —

SMS, MMS and mobile internet were ushered in by which generation?

When a mobile phone is able to communicate beyond its service operator's coverage area, it is called —

The third generation (3G) replaced circuit switching with —

In the third generation, the data transfer rate increased up to —

WCDMA stands for —

UMTS stands for —

The fourth generation (4G) replaced packet switching with —

Fourth generation mobile phones operate in which standard?

Mobile devices in 4G can get data transfer rates up to —

How much faster is 4G compared to 3G?

The fifth generation networking system is being called the —

MIMO (among 5G standards) stands for —

Consider the following statements:

A computer network means a set of interconnected computer devices bound by geographical boundaries and the process they use to —

The communication and data transfer methods of two or more computing devices jointly is called —

The purpose of establishing a network between two or more devices is to —

The Internet is the best example of sharing which type of resource?

Buying only one software license and sharing it among devices of a network is an example of —

When all devices in a network send print commands to one single printer, it is an example of —

Computer networks can be classified based on topography, service structure, and —

Based on topography, computer networks can be classified into how many types?

The home network an individual builds around his computer device is called a —

The span of a PAN coverage can be about —

Which is the most used network in our day to day lives?

Using routers and repeaters, the range of a LAN can be increased to a maximum of —

A network made of multiple LANs in an area, such as a university, is called a —

CAN can have a coverage range of —

A MAN connects computer devices inside an —

MAN can have a coverage area of up to —

The prime example of a WAN is the —

Which network is bigger than a CAN but smaller than a WAN?

Consider the following ordering of network sizes from smallest to largest:

Which network works without any central servers?

A network with two or more client stations and a centralised server station is called a —

A client-server network is also called a —

In a centralised network, the single centralised server is called the —

A combination of peer to peer and client-server networks is called a —

Which type of network is popular in corporate organizations?

A network that does not restrict its users, allowing any device to join or leave at any time, is a —

WAN or the internet is a good example of a —

In which network do new users need access permission from the network administrator?

PAN, LAN or CANs are examples of —

Consider the following about private networks:

The word Modem is the short form of —

A modem converts —

Which device has no processing abilities and just broadcasts a signal without any alterations?

Which device has replaced hubs in computer networking systems?

A switch uses which address to uniquely identify a computer inside the switch?

MAC stands for —

Switches can have how many ports?

Which device can connect two or more networks with the same protocol and determine the shortest path for data transmission?

Routers can connect multiple LANs to create a —

A router can connect networks that have —

Which device is used to connect two networks with different protocols?

A gateway is also known as a —

NIC stands for —

Consider the following statements:

Network topology refers to the manner in which the links and nodes of a network are —

The connecting points of each computer or peripheral device in a network are called —

In which topology are all nodes connected to a central connection line called the bus?

How many terminators does a bus have?

Which is an advantage of bus topology?

A disadvantage of bus topology is that —

In which topology are computer devices connected in a circular fashion?

In ring topology, the data flow is —

A disadvantage of ring topology is that if one computer device is disabled —

In which topology are devices connected to a central hub or switch?

Which cables are generally used to construct star topology?

A disadvantage of star topology is that —

Which topology is also known as a hierarchical topology?

In tree topology, the last level which does not have another level after it is called the —

A disadvantage of tree topology is that if the root host server is disabled —

In which topology is every device directly connected to every other device?

Mesh topology is also known as a —

In mesh topology with $n$ nodes, how many wires are needed?

In mesh topology with $n$ nodes, each node needs how many connections?

Which sectors use mesh topology where data security and reliability are the priority?

A topology that accompanies star, ring, mesh and bus topologies is called a —

The internet is based on which topology?

Consider the following statements:

Cloud computing is the delivery of computing services over the —

Cloud computing is best described as a —

Cloud computing can be categorized into how many types?

A cloud where a singular organization has ownership and control of the management is called a —

Cloud services open to the public on the internet, like those of Amazon and Google, are called —

A combination of private and public or community clouds is called a —

The services provided by cloud computing organizations can be divided into how many types?

In which cloud service model are service infrastructures rented out via the cloud (e.g. Amazon EC2)?

IaaS stands for —

In which model are computing platforms (OS, development environment, database) rented out as services?

Microsoft's Azure and Google's App Engine are prime examples of —

In which model do customers get access to the service application and its databases (e.g. Google Drive, Dropbox)?

Google Drive is a very popular example of which cloud model?

In which model do customers rent network services like WAN and SVPN from a cloud vendor?

In the cloud "Pay as You Go" model, customers —

Which is a sensitive risk attached to cloud computing?

Consider the following cloud service models and examples:

What is the unit of data transfer?

A group SMS is —

Which device can perform data filtering?

Bit synchronisation is —

The purpose of a computer network is —

Read the passage: Humaira's father and another officer gave print commands from their own computers but the print out was made from the same printer; his father also talked with another officer out of the country. The network described is —

In the described system (Humaira's father's office), one can have —

A plan was undertaken to connect all of the laptops in the same room. What network will be used?

How will the laptops in the same room be connected?

Kamal Reza established a network to communicate with different branches of his office inside Dhaka. What is the network used here?

Kamal Reza decided to change the communication medium to improve data transfer speed. What will be the repercussions of his decision?

College Y has three buildings each with its own computer network, located far apart, and cable connections are not an option for merging them. Which network system should the Principal use?